Location/s: Glasgow, Brighton, Newcastle, York, Croydon, Bristol; UK

Mott MacDonald is a global engineering, management, and development consultancy with over 20,000 employees across more than 50 countries and 140+ offices.

We work across incredible global industries, delivering exciting work that is defining our future and making an important societal impact in the communities we serve. Our people power our performance - we succeed when they do. With countless opportunities to collaborate, learn, and grow, the possibilities for excellence are as varied as every individual.

Whether you want to grow as a subject matter expert or broaden your experience with roles across our international community, you're surrounded by global specialists who want to combine their expertise and champion you to be your best. As a proudly employee-owned business, we benefit our clients, our communities, and each other, investing in creating the right space for everyone to feel empowered, included, and valued. Whatever your ambition, Mott MacDonald is where people come to be brilliant.

About the business unit

The Energy unit delivers services to clients globally across several sectors including hydropower, nuclear, waste, renewable generation and transmission & distribution networks. Together we provide integrated engineering and project management services across the project lifecycle - from concept and design to construction and operations, to decommissioning or repowering and life extension. Together with our clients, we're helping to deliver the energy transition globally.

Overview of the role





The Technical principal will support a wide range of client projects from early inception and master planning through concept design, detailed design, commissioning and final completion. The role sits within the Energy Unit's Transmission & distribution division and covers diverse sectors including renewable energy, aviation, data centres, healthcare, nuclear, defence and estate planning.

Key responsibilities and duties include:

Front-End & Optioneering

- Capture and agree stakeholder requirements
- Assess network configuration and resilience
- Evaluate operational scenarios and their impacts
- Lead site surveys
- Produce clear reports enabling client decision-making

Detailed Design (Typically to RIBA Stage 4)

- Electrical network design for 11kV-33kV systems
- Power system cable sizing, routing and termination
- Substation layout development and main equipment specifications
- Design of control and protection schemes, including G99 compliance
- Multicore and fibre optic cable design
- Interpretation of client/DNO standards and regulations
- Earthing system design
- Substation LVAC and DC system design
- Production and issue of high-quality design deliverables

Commissioning Support

- Respond to construction and commissioning queries
- Attend workshops, design reviews, and site meetings
- Resolve technical issues while considering commercial impacts

Project Leadership





- Ensure understanding of project scope and deliverables
- Coordinate multi-disciplinary design interfaces
- Conduct design reviews and maintain quality against contract and programme requirements
- Act as key client interface, leading progress meetings and workshops

Additional Skills & Duties

- Provide significant input during bid stage (resourcing, capability statements, methodologies, programmes)
- Help build and develop the electrical design team
- Oversee technical management and resolve design challenges
- Ensure compliance with all client, safety, and environmental standards
- Use Microsoft Office applications confidently
- Travel within the UK or internationally as required
- Demonstrate initiative, self-motivation and sound decision-making

Candidate Specification

Essential:

- Education: Bachelor's or Master's degree in Electrical Engineering
- Professional registration: Chartered Engineer (or equivalent status)
- Extensive experience in electrical project engineering
- Strong knowledge of 11kV-33kV network design, substation design and HV/LV systems
- Proven understanding of control and protection schemes (including G99)
- Experience producing tender specifications, calculations, designs and drawings
- Ability to lead engineering projects from early design to commissioning
- Robust communication skills (written, verbal, stakeholder engagement)
- Ability to manage interfaces across multi disciplinary design teams
- Proficiency with Microsoft Office applications
- Knowledge of DNO/TSO standards and regulations at all distribution and transmission voltage levels
- Experience me

📌 Technical Principal (Brighton)
🏢 Mott Macdonald
📍 Brighton